円柱群の流力弾性振動を利用した水力エネルギー変換に関する基礎的実験

抄録

Water tunnel tests of small hydro-power generation utilizing fluidelastic vibration occurred at circular cylinders subject to cross flow have been conducted. To investigate the influence of pitch to diameter ratio and geometry of array on output, experimental apparatus is designed to change the pitch of adjacent cylinders and configuration of cylinder array. The patterns of array are three kinds: six cylinders in square array, four cylinders which consists of three cylinders located upstream and one cylinder located downstream, and two cylinders in tandem. Downstream cylinders are pinned supported at upper ends so that they oscillate such as pendulum in one direction, and test cylinder is center of these. As a result, in six cylinders, power is high when pitch to diameter ratio in drag direction is narrow and that in lift direction is wide. Besides, when the geometry of array is six cylinders in square array, power becomes higher at lower flow speed compared with other configurations of array.